troops in afghanistan. three americans were killed and one was wounded when they were attacked by insurgents in the eastern part of the country. their afghan interpreter was also killed. most american families who lose a loved one in a war zone get a letter of condolence from the president of the united states. but there are a few who are denied that honor. among them, families of troops who commit suicide. we first reported this last week and tonight we have learned that the white house is changing its policy. elaine quijano brings us up to date with the father who led the fight to change the rules. >> i had many doubts. many, many doubts but we're very pleased. >> reporter: last week, greg keesling got the call from the white house he'd waited nearly two years to receive. he learned his family's long wait for acknowledgment from the commander-in-chief was almost over. >> o'neil, my oldest son, came down, and we had a hug and it was very emotional, and "dad, it's going to happen." and that was very good mo